September Weather in Hilliard, United States

Last updated: June 24, 2025

In Hilliard, United States, the average temperature in September is a pleasant 20°C (69°F), with daily extremes ranging from a brisk 5°C (41°F) to a warm 35°C (94°F). Expect 89 mm (3.5 in) of precipitation over about 8 days, contributing to an average humidity of 73%, creating a lush and vibrant atmosphere throughout the month.

September Temperature in Hilliard

In September in Hilliard, the average temperature is 20°C (69°F). Maximum can reach 35°C (94°F) and minimum can be as low as 5°C (41°F). Be prepared for a wide range of temperatures, making it ideal for packing layers for your travels.

September Weather in Hilliard: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Hilliard, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Hilliard, September typically has an average temperature of 20°C (69°F), with highs reaching up to 35°C (94°F) and lows dropping to around 5°C (41°F).
JanFebMarAprMayJunJulAugSepOctNovDec313442526472767369584236
Data source: Temperature data for Hilliard generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Hilliard

In Hilliard in September, the precipitation amount is 89 mm (3.5 in) over a span of 8 days.

September Precipitation Trends in Hilliard

The chart displays monthly precipitation patterns in Hilliard, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In Hilliard, September typically receives around 89 mm (3.5 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec761011081131271371158689969497
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Hilliard

In Hilliard in September humidity is 73%. With an average temperature of 20°C (69°F), this humidity feels like a warm embrace, making travel slightly sticky but ultimately comfortable as long as you stay hydrated and take breaks in the shade.

September Average Humidity in Hilliard

This chart illustrates the average monthly humidity levels in Hilliard, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Hilliard is approximately 73%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%88%87%85%81%82%81%73%73%78%89%87%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Hilliard

In Hilliard in September, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Hilliard.

Maximum UV Index Levels in Hilliard for September

The chart shows the monthly maximum UV Index (UVI) for Hilliard in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In September, the maximum UV index in Hilliard typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356910101098643
Data source: Hilliard September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How September Weather in Hilliard Compares to Other Months

Weather in Hilliard varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Hilliard, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Hilliard, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (31°F)76 mm (3.0 inches)88%moderate
February Weather1°C (34°F)101 mm (4.0 inches)88%moderate
March Weather6°C (43°F)108 mm (4.2 inches)87%high
April Weather11°C (52°F)113 mm (4.4 inches)85%very high
May Weather18°C (64°F)127 mm (5.0 inches)81%very high
June Weather22°C (72°F)137 mm (5.4 inches)82%very high
July Weather24°C (76°F)115 mm (4.5 inches)81%very high
August Weather23°C (74°F)86 mm (3.4 inches)73%very high
September Weather20°C (69°F)89 mm (3.5 inches)73%very high
October Weather14°C (58°F)96 mm (3.8 inches)78%high
November Weather5°C (42°F)94 mm (3.7 inches)89%moderate
December Weather2°C (36°F)97 mm (3.8 inches)87%moderate

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